all responsible nations need to band together to persuade the assad regime to have a cease- fire. >> reporter: parts of the syrian city lay in rubble following four explosions. syrian state tv says three sue a side bombers -- suicide bombers detonated cars. packed with explosives. they went off within minutes of each other near a military officers club. the city has become one of the biggest battlegrounds in the 18- month fight between rebels and government forces. serious parliament -- syria's parliament condemned the bombs as terrorists trying to oust president assad. the explosions triggered panic among some residents who just want the conflict to end. vinita nair for cbs news. >> president assad reportedly visited ahelp poe on tuesday to get a firsthand look at the fighting. he has ordered 30,000 more troops into that battle. >>> here's a look at some other things making news now at 4:37. teachers in chicago have approved a new three-year contract. it includes pay increases and a new evaluation system. the chicago board of education is expected to approve it later this month. the